2521962197 has 4 divisors (see below), whose sum is σ = 2522132940. Its totient is φ = 2521791456.

The previous prime is 2521962181. The next prime is 2521962211. The reversal of 2521962197 is 7912691252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 380679121 + 2141283076 = 19511^2 + 46274^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521962197 - 2⁴ = 2521962181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521962497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60872 + ... + 93537.

It is an arithmetic number, because the mean of its divisors is an integer number (630533235).

Almost surely, 2^2521962197 is an apocalyptic number.

It is an amenable number.

2521962197 is a deficient number, since it is larger than the sum of its proper divisors (170743).

2521962197 is a wasteful number, since it uses less digits than its factorization.

2521962197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170742.

The product of its digits is 136080, while the sum is 44.

The square root of 2521962197 is about 50219.1417389824. The cubic root of 2521962197 is about 1361.1715317990.

The spelling of 2521962197 in words is "two billion, five hundred twenty-one million, nine hundred sixty-two thousand, one hundred ninety-seven".